te that lay so firmly in Jefferson's mind, and which was followed up with incredible hardships by the Lewis and Clark expedition, has since been traversed by two railroads, built after the first transcontinental rails were laid. If Jefferson had desired to find the shortest and most feasible route across the continent, he would have pointed to the South Pass and Utah basin trails. But these would have led the explorers into California, then and long afterwards a Spanish possession. The entire line finally traced over the Great Divide lay within the territory of the United States.

But it must be remembered that while the expedition was being organized, the vast Territory of Louisiana was as yet a French possession. Before the party were brought together and their supplies collected, the territory passed under the jurisdiction of the United States. Nevertheless, that jurisdiction was not immediately acknowledged by the officials who, up to that time, had been the representatives of the French and Spanish